Trigonometry Examples

Solve for .
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Find an angle that is coterminal to .
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Add to .
The resulting angle of is coterminal with but isn't positive. Repeat the step.
Add to .
The resulting angle of is positive and coterminal with .
Find the value using the definition of cotangent.
Substitute the values into the definition.
Simplify the result.
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Multiply the numerator by the reciprocal of the denominator.
Cancel the common factor of .
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Rewrite.
Factor out the greatest common factor .
Cancel the common factor.
Rewrite the expression.
Cancel the common factor of .
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Factor out the greatest common factor .
Cancel the common factor.
Rewrite the expression.
Simplify.
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Multiply and .
Divide by .
Multiply by .
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